Marathon swimmer Diana Nyad swims during the Underwater Music Festival Saturday, July 11, 2015, in the Florida Keys National Marine Sanctuary off Big Pine Key, Fla. Nyad was one of hundred of participants who listened to a local radio station’s four-hour broadcast piped beneath the sea via underwater speakers, featuring music programmed for the subsea listening experience as well as coral reef conservation messages. In September 2013, Nyad became the first person to ever swim from Cuba to the Florida Keys without a shark cage. FOR EDITORIAL USE ONLY (Bob Care/Florida Keys News Bureau/HO)